1 /*
2 * Ptrace test for VMX/VSX registers in the TM context
3 *
4 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11 #include "ptrace.h"
12 #include "tm.h"
13 #include "ptrace-vsx.h"
14
15 int shm_id;
16 unsigned long *cptr, *pptr;
17
18 unsigned long fp_load[VEC_MAX];
19 unsigned long fp_store[VEC_MAX];
20 unsigned long fp_load_ckpt[VEC_MAX];
21 unsigned long fp_load_ckpt_new[VEC_MAX];
22
load_vsx(void)23 __attribute__((used)) void load_vsx(void)
24 {
25 loadvsx(fp_load, 0);
26 }
27
load_vsx_ckpt(void)28 __attribute__((used)) void load_vsx_ckpt(void)
29 {
30 loadvsx(fp_load_ckpt, 0);
31 }
32
tm_vsx(void)33 void tm_vsx(void)
34 {
35 unsigned long result, texasr;
36 int ret;
37
38 cptr = (unsigned long *)shmat(shm_id, NULL, 0);
39
40 trans:
41 cptr[1] = 0;
42 asm __volatile__(
43 "bl load_vsx_ckpt;"
44
45 "1: ;"
46 "tbegin.;"
47 "beq 2f;"
48
49 "bl load_vsx;"
50 "tsuspend.;"
51 "li 7, 1;"
52 "stw 7, 0(%[cptr1]);"
53 "tresume.;"
54 "b .;"
55
56 "tend.;"
57 "li 0, 0;"
58 "ori %[res], 0, 0;"
59 "b 3f;"
60
61 "2: ;"
62 "li 0, 1;"
63 "ori %[res], 0, 0;"
64 "mfspr %[texasr], %[sprn_texasr];"
65
66 "3: ;"
67 : [res] "=r" (result), [texasr] "=r" (texasr)
68 : [fp_load] "r" (fp_load), [fp_load_ckpt] "r" (fp_load_ckpt),
69 [sprn_texasr] "i" (SPRN_TEXASR), [cptr1] "r" (&cptr[1])
70 : "memory", "r0", "r1", "r3", "r4",
71 "r7", "r8", "r9", "r10", "r11"
72 );
73
74 if (result) {
75 if (!cptr[0])
76 goto trans;
77
78 shmdt((void *)cptr);
79 storevsx(fp_store, 0);
80 ret = compare_vsx_vmx(fp_store, fp_load_ckpt_new);
81 if (ret)
82 exit(1);
83 exit(0);
84 }
85 shmdt((void *)cptr);
86 exit(1);
87 }
88
trace_tm_vsx(pid_t child)89 int trace_tm_vsx(pid_t child)
90 {
91 unsigned long vsx[VSX_MAX];
92 unsigned long vmx[VMX_MAX + 2][2];
93
94 FAIL_IF(start_trace(child));
95 FAIL_IF(show_vsx(child, vsx));
96 FAIL_IF(validate_vsx(vsx, fp_load));
97 FAIL_IF(show_vmx(child, vmx));
98 FAIL_IF(validate_vmx(vmx, fp_load));
99 FAIL_IF(show_vsx_ckpt(child, vsx));
100 FAIL_IF(validate_vsx(vsx, fp_load_ckpt));
101 FAIL_IF(show_vmx_ckpt(child, vmx));
102 FAIL_IF(validate_vmx(vmx, fp_load_ckpt));
103 memset(vsx, 0, sizeof(vsx));
104 memset(vmx, 0, sizeof(vmx));
105
106 load_vsx_vmx(fp_load_ckpt_new, vsx, vmx);
107
108 FAIL_IF(write_vsx_ckpt(child, vsx));
109 FAIL_IF(write_vmx_ckpt(child, vmx));
110 pptr[0] = 1;
111 FAIL_IF(stop_trace(child));
112 return TEST_PASS;
113 }
114
ptrace_tm_vsx(void)115 int ptrace_tm_vsx(void)
116 {
117 pid_t pid;
118 int ret, status, i;
119
120 SKIP_IF(!have_htm());
121 shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
122
123 for (i = 0; i < 128; i++) {
124 fp_load[i] = 1 + rand();
125 fp_load_ckpt[i] = 1 + 2 * rand();
126 fp_load_ckpt_new[i] = 1 + 3 * rand();
127 }
128
129 pid = fork();
130 if (pid < 0) {
131 perror("fork() failed");
132 return TEST_FAIL;
133 }
134
135 if (pid == 0)
136 tm_vsx();
137
138 if (pid) {
139 pptr = (unsigned long *)shmat(shm_id, NULL, 0);
140 while (!pptr[1])
141 asm volatile("" : : : "memory");
142
143 ret = trace_tm_vsx(pid);
144 if (ret) {
145 kill(pid, SIGKILL);
146 shmdt((void *)pptr);
147 shmctl(shm_id, IPC_RMID, NULL);
148 return TEST_FAIL;
149 }
150
151 shmdt((void *)pptr);
152 ret = wait(&status);
153 shmctl(shm_id, IPC_RMID, NULL);
154 if (ret != pid) {
155 printf("Child's exit status not captured\n");
156 return TEST_FAIL;
157 }
158
159 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
160 TEST_PASS;
161 }
162 return TEST_PASS;
163 }
164
main(int argc,char * argv[])165 int main(int argc, char *argv[])
166 {
167 return test_harness(ptrace_tm_vsx, "ptrace_tm_vsx");
168 }
169